Tresco Radar Overlay - Operator’s manual
Page 20
Indications and alarms
If the main interface signals are not correctly detected, the product shows the
following appropriate indication or alarm:
No radar input,
No or bad position input,
No or bad heading input,
In these cases, the chart image will be suppressed as it will not align properly with
the radar image. Verify your navigation sensors (GPS, DGPS, GPS-compass or
electronic compass) and make sure you can pinpoint the failing component.
During normal operation, the user sees at the bottom-right of his screen:
DGPS OK or GPS OK
NO
ALARMS
The normal white font color indicates normal operation.
In case of signal errors, the following indications or alarms will be displayed:
•
When the main GPS-receiver is able to receive a “D” beacon-signal(RTCM),
the quality of the position improves. This condition is indicated by
displaying “DGPS” in stead of “GPS” in the normal white font. If the position
is not received during 10 seconds, the GPS alarm is indicated in a bright red
font color.
•
When the heading fails, because there is no true-heading received by the
main antenna during 10 seconds, the heading is displayed in a bright red
font color.
Consult your installation company in case of these indications or alarms.
Local VHF channel indication
At the top, you’ll see an extra window showing current, local VHF channels that can
be used to listen and call out. The indication of the correct channels automatically
changes during your journey.
